Support simple math in size & positioning boxes

[wayfaringrob]

In Adobe products, the size and position fields support basic "My Dear Aunt Sally" math, and I find it infinitely useful for nudging things over or resizing them by a set amount - for example, to quickly make something with a width of 0.3333 wider by 0.25, you can place your cursor after the 0.3333 and type "+ 0.25" or "+1/4" and hit enter. ArcGIS Pro doesn't support this, so I often have to get out a calculator and re-calculate the new value for each thing that needs it and enter the new value. Little improvements like this would make designing layouts and graphics much simpler and easier.